Why this rock is probably not a meteorite:

There's no fusion crust. The outside is stained, but there's no glassy crust.

The interior texture does resemble some lunar meteorite breccias in that there is a whole range of clast sizes and they're mostly angular, not highly rounded. (See NWA 2995) It's suspicious, however, that all of the gray "clasts" look the same. Lunar breccias are sometimes called "polymict" breccias because they're mixtures of different kinds of rocks.
What is it?

It might be a meteorite; the finder is having a chemical analysis done.

Alternatively, it might be a terrestrial volcaniclastic rock, like an ignimbrite, or even a piece on concrete.

Whole rock above; ~3-cm wide closeup below.


Prepared by:

Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don't contact me about the meteorite you think you’ve found until you read this and this.